Men sizing: we recommend a sizing similar to street shoe size for performance fit. Go up 0.5 or 1 US for a comfy fit.
For example, if your foot length is 26cm, your street shoe size is 9 or 9.5 US. Your performance fit in the Drone CS HV is 9.5 US. For a comfortable fit you should take 10 US. Despite being ''HV'' the shoe is still narrow for optimized performance.
If you are used to the previous Drone version keep the same sizing in the Drone 2.
The Drone CS is a bit tighter than the Drone 2 but breaks in easily. Once broken in, the Drone CS and Drone 2 should have a similar sizing however, a lot of climbers size up by 0.5 in the Drone CS compared to the Drone 2.